Experimental Knot Part 2

Dr. Elena Voss' experimental vasodilator pills was swallowed by her Doberman. Part 2

[Disclaimer: This is entirely fictional erotica created for fantasy purposes. It does not reflect real events, nor does it promote, endorse, or condone bestiality, animal abuse, or any illegal/non-consensual activities in reality. Strictly for consenting adults 18+. If you are offended by taboo themes, please do not read.]

The tie held for twenty-three agonizingly blissful minutes. Elena's pussy clenched rhythmically around the swollen knot, milking it like it could draw out more cum even after the thick spurts had slowed to a steady ooze. Her lower belly distended noticeably now, a soft rounded bulge from the sheer volume trapped inside her womb. Every throb of his cock sent fresh pressure against her cervix, making her gasp and grind her hips in tiny helpless circles. Rex panted hot breaths across her sweat-slick tits, tongue lolling, still rock-hard inside her despite the release.

When the knot finally began to shrink, it popped free with a wet, obscene slurp. A gush of creamy dog cum poured out of her stretched cunt in thick white ropes, soaking the sheets beneath her ass and running down her crack to pool under her tailbone. Her pussy gaped open, pink walls fluttering, unable to close fully after the brutal stretch. The sight made her clit throb harder. She reached down, fingers sliding through the mess, scooping up a glob and smearing it across her swollen lips before pushing two fingers inside herself to feel how loose and ruined she was.

Rex's cock hadn't flagged at all. Still nine inches of glistening red meat, knot deflated but already swelling again, veins pulsing visibly. The vasodilator kept his blood rushing south with merciless force. He whined, hips twitching, already humping the air toward her dripping hole. Elena's eyes glazed over with fresh hunger. The shame that had burned her cheeks earlier was gone, replaced by a feral need to be used until she couldn't walk.

She rolled onto her stomach, ass up, knees spread wide. Cum still leaked from her pussy in slow drips as she arched her back, presenting like a bitch in heat. "Come on, Rex. Mount me again. Fuck your mama's sloppy cunt until it can't take any more." Her voice came out hoarse, wrecked from earlier throat-fucking.

Rex didn't hesitate. He scrambled up, front paws hooking over her hips, claws scratching red lines across her toned flanks. His cock slapped wetly against her ass cheeks before finding her entrance on the second thrust. He slammed home in one brutal stroke, knot already half-inflated battering her puffy lips. Elena cried out, face pressed into the pillow, muffling the sound as he started pistoning with animal speed. The wet slap of his balls against her clit echoed through the room, mixing with the squelch of cum being churned inside her.

She pushed back to meet every thrust, ass cheeks jiggling, tits swaying heavily beneath her. "Harder, you big stud. Breed this pussy again. Fill me until I'm leaking for days." Her fingers found her clit, rubbing frantic circles through the slick mess. Orgasm crashed over her almost immediately, walls spasming so hard they nearly pushed him out, but Rex growled and drove deeper, knot popping past her entrance with a burning stretch.

Locked again. This time the angle was different, deeper, the knot pressing directly against her G-spot. Cum jetted in fresh powerful ropes, bloating her even more. Her belly pressed against the mattress, the pressure making her moan into the sheets. She came twice more while tied, body shaking, squirting around the seal in hot bursts that soaked his fur and her thighs. Rex panted above her, tongue dragging across her shoulder blades, claiming her with sloppy licks.

When the knot finally released a second time, Elena was trembling, thighs quivering, pussy a swollen, cum-drenched wreck. But she wasn't done. She flipped onto her back again, legs hooked over his shoulders, pulling him down. "One more time, boy. Ass now. I want that knot stretching my shithole until I scream."

She guided his still-throbbing cock to her asshole, already slick from earlier cum and her own juices. The pointed tip breached her easily this time, sliding in with a filthy glide until the knot battered her rim. Rex thrust hard, forcing it through in one savage push. Elena's back arched off the bed, a raw scream tearing from her throat as her ass stretched around the fist-sized bulb. Pain and pleasure blurred into white-hot ecstasy.

He fucked her ass like a piston, knot popping in and out with each brutal stroke, dragging her rim inside-out on the out-stroke before slamming back in. Her hand flew to her clit again, rubbing desperately while her other mauled her tits, pinching nipples until they bruised. "Yes, fuck! Wreck my asshole, Rex! Knot it deep and pump me full!"

The knot locked for the third time, buried to the hilt in her bowels. Hot cum flooded her guts in endless spurts, pressure building until her lower belly swelled again, this time from the rear. She orgasmed so hard her vision tunneled, body convulsing, ass clenching around him in violent waves. Cum leaked past the seal in creamy rivulets, running down her crack and pooling beneath her.

They stayed tied like that for another twenty minutes, Elena stroking his fur, whispering filthy praise while her body throbbed around him. "Good boy... such a perfect breeding stud... mama's holes are yours now."

When he finally slipped free, her ass gaped wide, prolapsing slightly in a soft pink ring, cum pouring out in heavy globs. Rex licked at the mess instinctively, rough tongue lapping her ruined holes, sending aftershocks through her oversensitive nerves. Elena lay there spent, chest heaving, body marked with scratches and bruises, filled in every way possible.

But his cock twitched again, still half-hard, the drug showing no sign of wearing off. She smiled weakly, voice raspy. "Round four, big boy? Mama's not done being your bitch yet."